Warp knitting machine



Oct. 19, 1948. F. LAMBACH 2,451,499

WARP KNITTING MACHINE Filed Feb. 25, 1947 4 Sheets-Sheet 1 INVENTOR FR/TZ Lfi/VEHC'H ATTORNEY Oct. 19, 1948. F. LAMBACH 2,451,499

WARP KNITTING MACHINE Filed Feb. 25, 1947 4 Sheets-Sheet 2 INVENTOR F/Q/TZ LAMB/90H ATTORNEY Oct. 19,1948. F. LAMBACH WARP KNITTING MACHINE 4 Sheets-Sheet 3 Filed Feb. 25, 1947 FIIIHIHHH'H i l INVENTOR FR/rZ Lfl/VB/qC/ ATTORNEY Oct. 19, 1948. LAMBACH 2,451,499

" I WARP KNITTING MACHINE Filed Feb. 25, 1947 4 Sheets-Sheet 4 INVENTOR F/P/TZ LfiMBHC/ ATTORN EY Fatenied Get. 19, 1 943 UNITED STATES PATENT OFFICE WARP KNITTING MACHINE Fritz Lambach, Tenafly, N. J.

Application February 25, 1947, Serial No. 730,816

10 Claims. 1

This invention relates to textile machines, and more particularly to warp knitting machines.

The warp yarns drawn from the warp beam or warp beams of a warp knitting machine during the operation thereof are tensioned by suitable means. For example, the warp yarns may be tensioned by a spring loaded tension rod engaged with the warp yarns. In such a case, the tension of the warp yarns is caused by the pulling action of the yarns on the tension rod so as to overcome the action of the springs and the inertia of the masses of the tension rod and its supporting elements and by the pulling action of the spring loaded tension rod on the warp yarns When the pulling action of the latter lessens. The higher the running speed of the machine, the shorter the intervals for said alternating tensioning actions. It has been found in practice, that, especially in machines running at a high speed, this mutual play is greatly disturbed by the reciprocating rocking movements of the warp guides alternatively pulling on the warp yarns and releasing same, whereby, at repeating intervals, excessive tensions are caused in the warp yarns and the latter are subject to a non-uniform tension during the operation of the machine.

An object of the present invention is to provide a warp knitting machine, wherein the warp yarns are subject to a constant tension during the operation of the machine.

A further object of the present invention is to provide a warp knitting machine with a device, by means of which actions of the Warp guides on the warp yarn-s tending to cause undesired modifications of the tension of the warp yarns tensioned by any suitable means may be compensated.

Another object of the present invention is to improve upon the construction of warp knitting machines as now ordinarily made.

With the above and other objects of the invention in view, the invention consists in the novel construction, arrangement and combination of various devices, elements and parts, as set forth in the claims hereof, certain embodiments of the same being described in the specification and be-- ing illustrated in the accompanying drawing; forming part of this specification, wherein:

Fig. 1 is a fragmentary side elevational view of a Warp knitting machine, a portion of a side wall of said machine being broken away,

Fig. 2 is a fragmentary front elevational view of the warp knitting machine shownin Fig. 1,

Fig. 3 is a fragmentary side elevational view of a different embodiment of a warp knitting ma- 2 chine, a portion of a side wall of the machine being broken away, and

Fig. 4 is a fragmentary front elevational View of a portion of a warp knitting machine as shown in'Fig. 3.

The drawings illustrate only those parts of warp knitting machines, which are necessary for the understanding of the invention.

It is understood, that the term warp beam .wherever used in the specification and claims may be applied to a single warp beam or an assembly of sectional warp beams.

, Referring now to Figs. 1 and 2, I0 generally indicates the frame of a socalled Simplex warp knitting machine having two banks of needles l2, two banks of sinkers l4, and .two banks of warp guides it.

The main shafts i8 journalled in suitable bearings of the frame lfi are driven by a motor 29. Said mot-or 2b is connected through a belt-drive 22 with one of the main shafts !8, which, in turn, is connected with the other main shaft by means of a gear train (not shown). Each of said main shafts 18 carries a plurality of cams for actuating certain mechanisms of the machine. For example, cams 24 are keyed to the right-hand main shaft i8. Each of said cams 24 is in operative engagement with a roller 26 adju-stably arranged at one end of a spring-loaded lever 28 mounted on a shaft 39 carried by the frame Id of the machine. The other end of said arm 28 is adjustably and pivotally engaged at 3'2 with one end of a link 34, the other end of which is pivoted at 36 to a crank 38 keyed to the guide shaft 40 journalled in suitable bearings of the frame it. A series of guide bar holders 42 secured to said guide shaft 40 carries the guide bars M, which, in turn, carry the warp guides E6 in a manner known per se. During the operation of the machine, the warp guides It connected with the guide shaft 40 are periodically rocked about the center of the guide shaft 413 in the direction of the arrow A by means of above described warp guide driving means 24, 28, 36, 33.

Beams 46 are rotatably arranged in suitable bearings of the machine. The warp yarns 48 drawn from the warp beams travel around a tension rod 55 and a tension regulating rod or bar 52 to the warp guides l6, which feed same to the needles 52. Each of the tension rods is carried by a series of arms 54 rigidly secured to a shaft 55 rotatably arranged in the frame III. A plurality of arms 58 is secured to each rotatable shaft 55. One end of a rod 69 slidably arranged in a bracket 62 attached to the frame It! is engaged with each arm 58. A spring 64 arranged between the bracket 62 and a nut 66 adjustably arranged on the threaded end of the shaft 63 tends to urge the arms 58 and 54 in the direction of the arrows B, whereby the tension rods 5%} can ried by the arms 54 and engaged with the warp yarns 48 tension the latter.

Each of above mentioned tension regulating rods or bars 52 is carried by a plurality of arms G8 rigidly secured to a shaft 78 journalled in the frame 59 of the machine. Actuating levers l2 secured to each shaft iii are pivotall engaged at l t with the upper end of a connecting rod '55, the lower end of which is pivotally and adjustably engaged at '38 with one arm of a bellcrank lever 88 loosely, but axially immovably arranged on the shaft 36. The bell-crank lever 85 is under the action of a spring 82 holding a roller 8 carried by the other arm of said bellcrank lever 89 in engagement with a cam 86 keyed to the main shaft l8. As will be readily understood, the cam 33 actuating the regulating bar driving means 88, i6, i2 causes rocking movements of the regulating bar 52 in the direction of the arrows C during the operation of the machine. The length of the stroke of the regulating bars 52 may be readily adjusted by an adjustment of the pivot '38 in the slot of the bell-crank lever 38 and/or by the insertion of the pin 14 into one of the series of holes 88 arranged in the actuating levers 52.

The regulating rod 52 is arranged in such a manner and the operation of its driving means 85, 8t, l6, i2 is timed in such a relationship to the operation of the warp guide driving means 24, 28, 34, 38, that the regulating rod 52 follows the reciprocating movements of the warp guides [6 as much as possible. In other words, considering the right-hand regulating rod 52 shown in Fig. 1, said regulating rod 52 is rocked in clockwise direction substantially to the same extent as thewarp guide i6 is rocked, when the latter is rocked in clockwise direction; on the other hand, when the warp guide i5 is rocked in counter-clockwise direction, the regulating rod 52 is rocked in counter-clockwise direction substantially to the same extent as the warp guide it. Owing to said substantially simultaneous reciprocating movements of the warp guide it and the regulating rod 52 to substantially the same degree and owing to the movement of the regulating rod 52 substantiall in the direction of travel of the warp yarns 48 from said regulating rod 52 towards said warp guides i6, the action of the warp guides is on the warp yarns 28 caused by the reciprocating rocking movements of the warp guides i6 is compensated by above described rocking movement of the tension regulating rod 52, so that the warp guides cannot cause an excessive tension in the warp yarns es. Therefore, the tension in the warp yarns it remains substantially constant during the operation of the machine.

In the embodiment of a Warp knitting machine shown in Figs. 3 and 4, the warp guides iii are again periodically reciprocated by the cam 24 keyed to the main shaft 58 and engaged with a cam'roller 28 of a spring-loaded lever 28 rocking the guide shaft ill through the medium of a link 35 pivotally connected with said lever 28 and a crank 38 keyed to said guide shaft 40. Furthermore, the warp yarns 48 drawn from the warp beams 46 are again tensioned by spring-loaded tension rods 59 in the same manner as described above in connection with Figs. 1 and 2. Furthermore, the warp yarns 4% travel likewise around said tension rods 55 and regulating rods 52 carried by arms as secured to a rotatable shaft 70. said shaft iii.

However, according to Figs. 3 and 4 said actuating levers I? are driven in a manner somewhat different from that shown in the embodiment of Figs. 1 and 2. According to Fig. 3 on each side of the machine the actuating levers 12 are pivoted at i'i l to the upper end of a connecting rod N5, the lower end of which is pivotally and adjustabl connected at llil'with a doublearmed lever E keyed to the guide shaft 49. Therefore, the actuating levers H2 and the regulating rods 52 connected with said actuatin levers 72 are rocked by the guide shaft ill which,.

in turn, is rocked by the warp guide driving means 24, 28, 3d, 38. Of course, the arrangement of the regulating bars 52 and the drive for rocking same is again constructed in such a manner, that the regulating rods 52'fo1low the reciprocating rocking movements of the warp guides as much as possible, so as to compensate the action of the rocking movements of the warp guides i6 for obtaining a substantially constant tension in the warp yarns 43 during the operation of the machine.

I have described preferred embodiments of my invention, but it is clear that numerous changes and omissions may be made without departing from the spirit and scope of my invention.

For example, the regulating rods 52 may be actuated by mechanisms or drives other than that shown in the drawings. 7

Moreover, the invention may be applied to different types of warp knitting machines, for example warp knitting machines having only one bank of needles or warp knitting machines wherein the warp yarns are tensioned by means other than spring-loaded tension rods.

What I claim is 1. A warp knitting machine comprising: a

rotatable driving shaft, a rotatable warp beam,

movable warp guides, warp guide driving means actuated by said driving shaft and associated with said warp guides for imparting periodic reciprocating movements to the latter so as to feed,

warp yarn drawn from said warp beam to the needles of the machine, means acting on said warp yarns for tensioning same, a movable tension regulating bar engaged with said warp yarns, and a tension regulating bar drive associated with said tension regulating bar for imparting periodic reciprocating movements to said tension regulating bar whereby tension modifying actions of the reciprocating warp guides on the tensioned warp yarns are substantially compensated.

2. A warp knitting machine comprising: a rotatable driving shaft, a rotatable warp beam, movable warp guides, warp guide driving means actuated by said driving shaft and associated with said warp guides for imparting periodic re- 7 ciprocating movements to the latter so as to feed warp yarn drawn from said warp beam to the needles of the machine, means acting on said warp yarns for tensioning same, a'movable tension regulating bar engaged with said warp yarns,

a tension regulating bar drive associated with said tension regulating bar for imparting periodic reciprocating movements to said tension regulating bar whereby tension modifying actions of the reciprocating warp guides on the tensioned warp yarns are substantially compensated, and means associated with said tension regulating bar drive Moreover, actuating levers 12 are keyed to g for adjusting the length of the stroke of the ten sion regulating 3. A warp knitting machine comprising: a rotatable driving shaft, a rotatable warp beam, movable warp guides, warp guide driving means actuated by said driving shaft and associated with said warp guides for imparting periodic re ciprocating movements to the latter so as to feed warp yarn dr wn from said warp beam to the needles of the machine, means acting on said warp yarns for tensioning same, a movable tension regulating oar engaged with said warp yarns, and tension regulating bar driving means associated with said tension regulating bar for liliparting periodic reciprocating movements to said tension regulating bar whereby tension modifying actions of the reciprocating warp guides on the tensioned warp yarns are substantially compensated, said tension regulating bar dri ..g means being actuated by said driving shaft.

4. A warp knitting machine comprising: a rotatable driving shaft, a rotatable warp beam, movable warp guides, warp guide driving means actuated by said driving shaft and associated with said warp guides for imparting periodic ciprocating movements to the latter so as to feed warp yarn drawn from said warp beam to the needles of the machine, means acting on warp yarns for tensioning same, a movable tension regulating bar engaging with said warp yarns, and tension regulating bar driving associated with said tension regulating bar for imparting periodic reciprocating movements said tension regulating bar whereby tension modifying actions of the reciprocating warp guides on the tensioned warp yarns are subst n tially compensated, said warp guide driving means being coupled with said tension regulating bar driving means for actuating the latter,

5. A Warp knitting machine comprising: a rotatable driving shaft, a rotatable warp beam, a rockable warp guide shaft, warp guides mounted on said warp guide shaft, warp guide driv" 3' means actuated by said driving shaft and associated with said warp guide shaft for imparting periodic reciprocating movements to the latter and the warp guides so as to feed warp yarn. drawn from said warp beam to the needles of the machine, means acting on said warp yarns for tensioning same, a movable tension regulating bar engaged with said warp yarns, and tension regulating bar driving means associated with said tension regulating bar for imparting periodic reciprocating movements to said tension regulating bar whereby tension modifying actions of the re ciprocating warp guides on the tensioned warp yarns are substantially compensated, said tension regulating bar driving means being actuate by said warp guide shaft.

6. A warp knitting machine comprising: a rotatable driving shaft, a rotatable warp beam, movable warp guides, warp guide driving means actuated by said driving shaft and associated with said warp guides for imparting periodic reciprocating movements to the latter so as to feed warp yarn drawn from said warp beam to the needles of the machine, a movable tension rod, resilient means acting on said movable tension rod so as to hold same in engagement with the warp yarns for tensioning the latter, a movable tension regulating bar, the warp yarns travelling from said tension rod over said tension regulating bar to said warp guides, and a tension regulating bar drive associated with said tension regulating bar for imparting periodic reciprocating movements to said tension regulating bar whereby tension modifying actions of the reciprocating warp guides on the tensioned warp yarns are substantially compensated.

'7. A warp knitting machine comprising: a rotatable driving shaft, a rotatable warp beam, movable warp guides, warp guide driving means actuated by said driving shaft and associated with said warp guides for imparting periodic reciprocating movements to the latter so as to feed warp yarn drawn from said warp beam to the needles of the machine, a movable tension rod, resilient means acting on said movable tension rod so as to hold same in engagement with the warp yarns for tensioning the latter, a movable tension regulating bar, the warp yarns travelling from said tension rod over said tension regulating bar to said warp guides, a tension regulating bar drive associated with said tension regulating bar for imparting periodic reciprocating movements to said tension regulating bar whereby tension modifying actions of the reciprocating warp guides on the tensioned warp yarns are substantially compensated, and means associated with said tension regulating bar drive for adjusting the length of the stroke of the tension regulatin bar.

8. A warp knitting machine comprising: a rotatable driving shaft, a rotatable warp beam, movable warp guides, warp guide driving means actuated by said driving shaft and associated with said warp guides for imparting periodic reciprocating movements to the latter so as to feed warp yarn drawn from said Warp beam to the needles of the machine, a movable tension rod, resilient means acting on said movable tension rod so as to hold same in engagement with the warp yarns for tensioning the latter, a movable tension regulating bar, the warp yarns travelling from said tension rod over said tension regulating bar to said warp guides, and tension regulating bar driving means associated with said tension regulating bar for imparting periodic reciprocating movements to said tension regulating bar whereby tension modifying actions of the reciprocating Warp guides on the tcnsioned warp yarns are substantially compensated, said tension regulating bar driving means being actuated by said driving shaft.

9. A warp knitting machine comprising: a rotatable driving shaft, a rotatable warp beam, movable warp guides, warp guide driving means actuated by said driving shaft and associated with said warp guides for imparting periodic reciprocating movements to the latter so as to feed warp yarn drawn from said warp beam to the needles of the machine, a movable tension rod, resilient means acting on said movable tension rod so as to hold same in engagement with the warp yarns for tensioning the latter, a movable tension regulating bar, the warp yarns travelling from said tension rod over said tension regulating bar to said warp guides, and tension regulating bar driving means associated with said tension regulatin bar for imparting periodic reciprocating movements to said tension regulating bar whereby tension modifying actions of the reciprocating warp guides on the tensioned warp yarns are substantially compensated, said warp guide driving means being coupled with said tension regulating bar driving means for actuating the latter.

10. A warp knitting machine comprising: a rotatable driving shaft, a rotatable warp beam, a

rockable warp guide shaft, Warp guides mounted on said Warp guide shaft, warp guide driving means actuated by said driving shaft and associated with said warp guide shaft for imparting periodic reciprocating movements to the latter and the warp guides so as to feed warp yarn drawn from said Warp beam to the needles of the machine, a movable tension rod, resilient means acting on said movable tension rod so as to hold same in engagement with the Warp yarns for tensioning the latter, a movable tension regulating bar, the Warp yarns travelling 'from said tension rod over said tension regulating bar to said warp guides, and tension regulating bar driving means associated with said tension regulating bar for imparting periodic reciprocating movements to FRITZ LAMBACH.

REFERENCES CITED The following references are of record in the I file of this patent:

FOREIGN PATENTS Number Country Date 554,806 Germany July 12, 1932 555,678 France Mar. 28, 1923 

